Display panel and display apparatus

• US 9,897,855 B2
• Filed: 03/25/2015
• Issued: 02/20/2018
• Est. Priority Date: 11/28/2014
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Yang, Yafeng, Lv, Jing, Zhu, Ming
• Primary Examiner(s): Lau, Edmond
• Application Number:
  US14/892,239
• Publication Number:
  US 20160357068A1
• Time in Patent Office: 1,063 Days
• CPC Class Codes: G02F 1/133504 Diffusing, scattering, diffracting elements associated to illuminating devices G02F1/133606
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/133565 inside the LC elements, i.e. between the cell substrates
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G02F 1/133617 Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
• CPC Class Codes: G02F 1/13362 providing polarized light, e.g. by converting a polarisation component into another one
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence
• CPC Class Codes: G02F 1/1337 Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements
• CPC Class Codes: G02F 2202/36 Micro- or nanomaterials
• CPC Class Codes: G02F 2203/055 wavelength filtering

Abstract

Embodiments of the present invention disclose a display panel and a display apparatus so as to increase the optical conversion efficiency of the display panel. The display panel comprises: an array substrate and a color filter substrate which are arranged oppositely; a liquid crystal layer arranged between the array substrate and the color filter substrate; an upper polarizing layer provided between the color filter substrate and the liquid crystal layer; and a quantum dot excitation layer provided on the color substrate, wherein the upper polarizing layer is configured such that a first linearly polarized light transmitted through the upper polarizing layer irradiates on the quantum dot excitation layer. By disposing the upper polarizing layer between the color filter substrate and the liquid crystal layer, a first linearly polarized light transmitted through the upper polarizing layer arrives at the quantum dot excitation layer, then the quantum dot excitation layer is excited by the first linearly polarized light and emits scattered light, the optical conversion efficiency of the display panel is thus increased.

Claims

1. A display panel comprising:

an array substrate and a color filter substrate which are arranged opposite to each other;

a liquid crystal layer arranged between the array substrate and the color filter substrate;

an upper polarizing layer provided between the color filter substrate and the liquid crystal layer;

a quantum dot excitation layer provided on the color substrate, and

a plurality of black matrices provided between the quantum dot excitation layer and the color filter substrate,

wherein the upper polarizing layer is configured such that a first linearly polarized light transmitted through the upper polarizing layer irradiates on the quantum dot excitation layer,

wherein the quantum dot excitation layer comprises a red quantum dot film corresponding to a red sub-pixel, a green quantum dot film corresponding to a green sub-pixel and a transparent film corresponding to a blue sub-pixel, which are alternately arranged, a first blue filter layer is provided between the red quantum dot film and the color filter substrate, and a second blue filter layer is provided between the green quantum dot film and the color filter substrate, and

wherein the black matrices are provided between the first blue filter layer and the second blue filter layer, and at the ends of the first blue filter layer and the second blue filter layer facing away from each other, respectively.

2. The display panel according to claim 1, further comprising a lower polarizing layer provided on a surface of the array substrate away from the liquid crystal layer, a second linearly polarized light transmitted through the lower polarizing layer irradiating on the upper polarizing layer to produce the first linearly polarized light.

3. The display panel according to claim 2, wherein

an absorption axis of the upper polarizing layer is orthogonal to that of the lower polarizing layer such that an initial display mode of the display panel is a normally black mode;

or

an absorption axis of the upper polarizing layer is parallel to that of the lower polarizing layer such that an initial display mode of the display panel is a normally white mode.

4. The display panel according to claim 3, wherein

the upper polarizing layer and the lower polarizing layer are formed of polarizing films coated on the color filter substrate and the array substrate, respectively;

or

the upper polarizing layer and the lower polarizing layer are formed of polarizing sheets disposed on the color filter substrate and the array substrate, respectively.

5. The display panel according to claim 1, wherein the red quantum dot film is formed by mixing red quantum dot particles with photoresist, the green quantum dot film is formed by mixing green quantum dot particles with photoresist, and the transparent film is formed by a transparent organic substance doped with scattered particles.

6. The display panel according to claim 5, wherein the diameters of the red quantum dot particles and the green quantum dot particles are in a range of 2 microns to 6 microns, and the diameters of the scattered particles are in a range of 2 nanometers to 10 nanometers.

7. The display panel according to claim 6, wherein the red quantum dot particles and the green quantum dot particles comprise CdTe particles or CdSe particles.

8. The display panel according to claim 1, further comprising:

an alignment layer provided between the upper polarizing layer and the liquid crystal layer.

9. A display apparatus comprising:

a display panel according to claim 1; and

a backlight module provided on a side of the display panel where the array substrate is disposed.

10. The display apparatus according to claim 9, wherein the backlight module is a blue backlight module.

11. The display panel according to claim 2, further comprising:

an alignment layer provided between the upper polarizing layer and the liquid crystal layer; and

a black matrix provided between the array substrate and the liquid crystal layer.

12. The display panel according to claim 3, further comprising:

an alignment layer provided between the upper polarizing layer and the liquid crystal layer; and

a black matrix provided between the array substrate and the liquid crystal layer.

13. The display panel according to claim 4, further comprising:

an alignment layer provided between the upper polarizing layer and the liquid crystal layer; and

a black matrix provided between the array substrate and the liquid crystal layer.

14. The display panel according to claim 1, further comprising:

an alignment layer provided between the upper polarizing layer and the liquid crystal layer; and

a black matrix provided between the array substrate and the liquid crystal layer.

15. The display panel according to claim 5, further comprising:

an alignment layer provided between the upper polarizing layer and the liquid crystal layer; and

a black matrix provided between the array substrate and the liquid crystal layer.